Dell U4919DW / MacBook pro 5k issue

The numbers shown is the "scaled" Box are NOT actual resolutions. they are the "text will look like" numbers. To get actual resolutions, you must look elsewhere, such as:

 Menu > About this Mac > (system report) > Graphics & Displays

Grant, you are wrong. In fyan's case, a 5120x1440 resolution is shrinked on 3840x1080 by the OS, and then again it is zoomed to 5120x1440 by the monitor. This looks horrible. You may compare it to a FullHD movie scaled down to SD and then shown on a HD TV.

As far as I know, the only way to get the combination "Intel UHD 630 - MacOS - 49" display with 5120x1440" is using the Picture-by-Picture mode. I can not stress clearly enough that everything works out of one piece, if the operating system is called "Windows".

I noticed today in macOS Catalina 10.15.2 there is a new override file at

/System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-1e6d/DisplayProductID-9e7b

It contains a single element "DisplayPixelDimensions" set to 5120x1440.

Is this for the LG 49BL95C-W display?

Does it fix the problem?

Will a similar override for the other similar displays fix those displays?

To know for sure what resolution and frequency a display is set to, you must check the onscreen menu of the display. If it doesn't have all the information then you can use SwitchResX to view the timing information of the current resolution be double clicking the current resolution in the Current Resolutions list.

To know how your display is connected to the computer (DisplayPort speed and lanes) and to get the unaltered EDID (which SwitchResX does not show) or the EDID of both DisplayPort connections of a dual link SST display (like the LG UltraFine 5K), then use the following command:

/System/Library/Extensions/AppleGraphicsControl.kext/Contents/MacOS/AGDCDiagnose -a > AGDCDiagnose_a.txt 2>&1

Each connection might have a different EDID, so you might want to do it for all the ports of a display.

Of course Catalina 10.15.2 doesn't work with the Dell. Instead of fixing the problem, Apple created a work around that only works with the LG display.

You need to copy the file Apple made for the LG display into the Dell folder. Rename the file using the product ID of the Dell display. Edit the DisplayVendorID and DisplayProductID instead the file with the IDs for the Dell display.

The Dell folder is DisplayVendorID-10ac. The Dell DisplayVendorID is 4268 decimal.

Use the AGDCDiagnose command and post the result so we can look at the EDID (just need the EDID part if there's no file uploads here). Don't forget to mention the display model and how it's connected. There might be different EDIDs for different connection types (different ports - HDMI, DisplayPort 1, DisplayPort 2, etc.) or different modes (DisplayPort 1.2, DisplayPort 1.4, PbP, etc.). So get the EDID of each and post the unique ones.

In Catalina, you may need to allow write capability to root to modify the overrides folder.

sudo mount -uw /

I use the script at https://gist.github.com/joevt/32e5efffe3459958759fb702579b9529

to load multiple EDIDs from different sources (for example, if you created files AGDCDiagnoseDisplayPort1.txt, AGDCDiagnoseDisplayPort2.txt, AGDCDiagnoseDisplayHDMI.txt, etc.) then you can do the following:

source EDIDUtil.sh
loadagdcfile AGDCDiagnose*.txt
listedids

It will group all the duplicate EDIDs together and list the sources of each EDID (which file(s) it was loaded from).

It's got nothing to do with the hardware, put Windows or Linux on the same machine and it'll work straight away at the correct resolution.

MacOS does not support the extended portion of the EDID profile the defines the native resolution and thats due to the 1.3 spec stating that 4096 is the largest width expected.

I'm currently running 4096x1440@70hz on my 49" Philips on a 2015 Macbook with Intel graphics.

Pinkie promise it's working just fine with bootcamp :-)

Macbook Mini 2018, U4919DW - Fresh install of windows 10 on bootcamp (10 mins ago to show this). USB-C to USB-C.

Despite my photos, the screen is crystal clear. Not like the blurry scaled screen on OSX.

The hardware of the Mac Mini 2018 works just fine with the 49" Dell, OSX is lacking.

Minor correction to previous post https://discussions.apple.com/thread/8641919?answerId=251812380022#251812380022

I had said that Apple rewrote HT202351. Actually what they did was redirected HT206587 to HT202351 and deleted HT206587. You can find HT206587 at https://web.archive.org/web/20191123020413/https://support.apple.com/en-us/HT206587

I created a patch for my Macmini8,1 (macOS Catalina 10.15.2) to allow resolutions greater than 4096 wide but it's not showing an image for timings wider than 4200. I can take screenshots though (I tested up to 5120x900). I'm not sure if the problem is with my adapter or the driver. I only tried 4104 which works. I should try more values to find the exact limit between 4104 and 4200. I could not find a significant difference in the log stream output between switching from 4096 to 4104 and switching from 4096 to 4200. The log stream command was mentioned at https://discussions.apple.com/thread/8641919?answerId=251812762022#251812762022

Before trying the patch, make a backup of /System/Library/Extensions/AppleIntelCFLGraphicsFramebuffer.kext. I think you might need to disable SIP.

sudo mount -uw /
IFS=$'\n'
for thefile in $(find /System/Library/Extensions -name 'AppleIntelCFLGraphicsFramebuffer'); do
	printf "Patching $thefile\n"
	sudo perl -i.bak -pe '$before = qr"(\x83\xc9)\x04(\xC1\xE1\x0A)"s;s/$before/$1\x08$2/g' $thefile
	printf "Re-signing $thefile\n"
	sudo codesign -f -s - $thefile
done
sudo touch /System/Library/Extensions
sudo kextcache -i /

If your Mac doesn't use AppleIntelCFLGraphicsFramebuffer then you might need a different patch. The patch modifies the width check in AppleIntelFramebuffer::ValidateSourceSize(IODetailedTimingInformationV2*). The original check is for 4096 or 5120 for when multilink flag is set. I changed it to 8192 and 9216.

There is a height check for ≤ 2880 pixels near the width check that I did not change.

The function outputs a message to log when the width or height is exceeded:

"[IGFB][INFO   ] FB%d: Mode with width %d and max %d rejected with multilink set to %d\n"

According to apple support, the super ultrawide resolution is currently not working because of some operating system issue. While the "more sqare" resolution of 5120x2880px is supported by the newer Mac Air, Mac Pro etc., a subset of that cannot be chosen.

This is contrary to what is proclaimed by apple in the tech specifications!!!

The option to use SwitchResX does not lead to true 5120x1440: It just scales the next smaller resolution (3840x1080), resulting in a pixelated picture.

This holds true for all super ultrawide monitors such as Phillips 499P9H, Samsung C49RG94SSU, DELL UltraSharp U4919DW, LG 49WL95C-W, and similar.

Hi,

I am thinking about buying a LG 49BL95C-W 49" to use with my MacBooks.  I have a 2019 13" MacBook Pro (for work), a 2017 13" Pro and a 2016 12" MacBook, all with Intel graphics.  My goal is to get the max resolution 5120x1440 over a single USB-C cable while charging the laptops.

I read the thread carefully and there seem to be two different issues ongoing.  Is this a correct summary?

1. For Mac's with AMD Radeon discrete graphics: 5120x144 worked prior to 10.15.0 and was fixed after 10.15.2.  joevt's EDID script was to fix this issue in 10.15; however that is no longer needed for the LG since 10.15.2. The monitor works perfectly (5120x1440) out of the box for AMD Radeon Macs.
2. For Macs with integrated Intel Iris graphics card: there is NO solution or workaround, even in 10.15.5 beta -- except to install Windows with Bootcamp or use 2 monitors with Picture-by-Picture with 2 cables.

How does 2 monitors picture-by-picture work for you?  At first I thought 2 "monitors" would defeat the purpose, but it may not be that bad after I thought about it.  Can you stretch apps seamlessly across "monitors" and have it work well?  There is no physical bezel but is there a virtual one?  Windows has a bit of "resistance" to move your monitors across screens.  Plus, going full screen with 2 "monitors" may be even better since YouTube, Zoom, etc only takes up half the display, albeit on left and right (not center), but they won't waste space on the left and right with bars.  On PC, I am used to working with 4x 27" monitors and I actually prefer having a different app full screen on each monitor. I am used to content not being centered.  It also seems good for sharing your screen on Zoom since you can share half of what you see, while keep your private notes open on the other "screen", and not force top/bottom letterboxing for your viewers.  Anything I am missing any downsides about PbP except 2 cables?

I've spent most of the day speaking with the senior technical team over the phone explaining (again) that both my work and personal 13" Macbook Pros (2017 (purchased in 2019) and 2018 model) are not showing the option to drive the U4919DW at 5120-by-1440 (but instead only get shown 3840-by-1080) resolution.

I called the support team 2 days ago and today they came back with an initial response: that the technical specification at: https://support.apple.com/kb/SP754?locale=en_GB is not accurate and indeed the only way to support the resolution (5120-by-1440) would be to use an external GPU. The current intel graphics is not able to support the required resolution (which you folks have already mentioned in this thread).

AND they will update the technical specification page in due course to make it clear!

I iterated the fact that this would mean that I have been mis-old a product based on the product description (see https://www.apple.com/uk/legal/statutory-warranty/) "The goods will match the description given of them." and based on UK Consumer Law, Apple should either refund me or provide a product the meets the outlined technical specification.

So now my case will get escalated (again) and I will be notified in 48/72 hours! Let's see what happens.

Ah, I didn't realize before that a second window opened for the second screen. There were multiple profiles for the Dell and the screens had selected different ones.

Now everything works perfect. Thank you so much! This display is a beauty, amazing to work with.

I just got the Monoprice Dark Matter 49" UW monitor and I am having difficulties getting my Macbook Pro 13" (2018), macOS 10.15.7 (19H114), to display the full 5120x1440 resolution. I am using a Cable Matters USB-C to DP on the left side Thunderbolt 3 ports connected to the monitor. At first, it was still only giving me 3840x1080, but after fiddling with SwitchResX and creating a custom resolution, SwitchResX started displaying resolutions up to 5120x1440. However, the Display preferences in Sys prefs did not show the same.

When I select 5120x1440 in SwitchResx, it tries to produce the resolution but the whole picture is scaled down and does not fill the entire screen. The aspect ratio looks correct, but for some reason the picture is shrunken in the middle of the screen with huge black bars on all sides. Not sure why it won't fill up the entire screen. SIP is disabled on my machine according to the commands. I currently have it setup to display as two separate screens at 2560x1440 so the output below reflects that.:

kextstat | grep Intel | egrep "Graphics|Framebuffer"
  132    0 0xffffff7f84126000 0x235000   0x235000   com.apple.driver.AppleIntelCFLGraphicsFramebuffer (14.0.7) 0A3CFAE4-5282-3569-B60A-169FFB86B569 <131 130 124 17 13 12 8 7 6 5 3 1>
  166    0 0xffffff7f844c6000 0xf7000    0xf7000    com.apple.driver.AppleIntelKBLGraphics (14.0.7) 1C0D406A-F030-308D-9506-39E3743F8944 <130 124 82 13 8 7 6 5 3 1>

ioreg -lw0 | grep "AAPL,ig-platform-id"
    | |   | |   "AAPL,ig-platform-id" = <0400a53e>

ioreg -lw0 | grep '<"Mac'
    |   "compatible" = <"MacBookPro15,2">
    |   "board-id" = <"Mac-827FB448E656EC26">
    |   "target-type" = <"Mac">
    |   "product-name" = <"MacBookPro15,2">
    |   "model" = <"MacBookPro15,2">

system_profiler SPHardwareDataType SPDisplaysDataType | sed '/.*Serial.*/d;/.*UUID.*/d'
Hardware:


    Hardware Overview:


      Model Name: MacBook Pro
      Model Identifier: MacBookPro15,2
      Processor Name: Quad-Core Intel Core i5
      Processor Speed: 2.3 GHz
      Number of Processors: 1
      Total Number of Cores: 4
      L2 Cache (per Core): 256 KB
      L3 Cache: 6 MB
      Hyper-Threading Technology: Enabled
      Memory: 16 GB
      Boot ROM Version: 1554.60.15.0.0 (iBridge: 18.16.13030.0.0,0)
      Activation Lock Status: Enabled


Graphics/Displays:


    Intel Iris Plus Graphics 655:


      Chipset Model: Intel Iris Plus Graphics 655
      Type: GPU
      Bus: Built-In
      VRAM (Dynamic, Max): 1536 MB
      Vendor: Intel
      Device ID: 0x3ea5
      Revision ID: 0x0001
      Metal: Supported, feature set macOS GPUFamily2 v1
      Displays:
        SwitchResX4 - H3C2R-HQ:
          Resolution: 2560 x 1440 (QHD/WQHD - Wide Quad High Definition)
          UI Looks like: 2560 x 1440 @ 120 Hz
          Framebuffer Depth: 30-Bit Color (ARGB2101010)
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Automatically Adjust Brightness: No
          Connection Type: Thunderbolt/DisplayPort
          Television: Yes
        SwitchResX4 - H3C2R-HQ:
          Resolution: 2560 x 1440 (QHD/WQHD - Wide Quad High Definition)
          UI Looks like: 2560 x 1440 @ 60 Hz
          Framebuffer Depth: 30-Bit Color (ARGB2101010)
          Mirror: Off
          Online: Yes
          Rotation: Supported
          Adapter Type: Apple USB-C Digital AV Adapter
          Automatically Adjust Brightness: No
          Connection Type: Thunderbolt/DisplayPort
          Adapter Firmware Version: 2.35
          Television: Yes

system_profiler SPSoftwareDataType | grep System
    System Software Overview:
      System Version: macOS 10.15.7 (19H114)
      System Integrity Protection: Disabled

... and your computer, it has a Discrete graphics chip or an Intel Integrated graphics chip?

SwitchResX works with the 15" but not with the 13". With the 13" (and the Mini) you are stuck with 3840x2160. With SwitchresX you only get an upscaled version of 5120x1440 which looks creepy.

Hi temizyurek,

Use ResXtreme software, it's the best solution for now.

It's works with my Philips 499P9H, it's not perfect but better than 3840*1080.

I hope Apple will fix that.